Retaining means for window-sashes.



D. J. DUNBAR.

RETAINING MEANS FOR WINDOW SASHES.

APPLICATION FILED Aus.t0, 1917.

MMD

l isi.

RETAINING MEANS FOR WINDOW-SSHES.

Specification of Letters Patent.

Application ledAugust 10, 191'?. Serial No. 185,413.

To all whom t may concern Be it known that I, DANIEL J. DUNBAR, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Re taining Means for Window-Sashes, of which the following is a specification.

My invention consists of improved retaining means for window sashes. One object of my invention is to provide retaining means of the above mentioned character which will efficiently hold slidable window sashes in any desired position without the requirement of the customary ropes, cords7 and counterbalancing means.

Another object is to make my invention vof simple construction, durable, and so that it can be easily and quickly manufactured and applied to windows.

rlhese objects, and other .advantageous ends which will be described hereinafter, I attain in the following manner, reference being had to the accompanying drawings in which j A Figure 1 is a front elevation of a window constructed in accordance with my `mvention.

Fig. 2 is an enlarged section on the line 2-2 of Fig. 1. j

Fig. 3 is a fragmentary sectional elevation taken on the line 3-3 of Fig. 2.

Fig. 4 is a fragmentary outside elevation ona smaller scale than Fig. 3 showing the side of the window frame with, the sashes removed. f

Fig. 5 is a transverse section through a spring holder which forms a part of my invention.

Fig. 6 is a view of similar nature to Fig. 4 showing one of the cover platesremoved in order to illustrate a modilication in which the retaining springs each includes two leaves or strips. .A

Referring to Figs. 1 to 5 inclusive of the drawing, 1- represents the fra'meof a window yhaving upper and lower slidable sashes and 3 respectively. Each side 4 and 5 of the frame lhas a cavity 6 formed therein, and since each of these cavitiesis designed to house similar elements, it will only be necessary to describe the elements contained within and adjacent one-of the cavities 6, and it will be understood that the `other of said cavities 6 .contain similar elements which perform the same function as those specifically described. i

Considering the side 4 of the frame l, its cavity 6 contains two rollers or wheels 7 and 8 mounted one above the other as clearly shown in Fig. 3.

The frame 1 has grooves 9 and 10 which are arranged parallel and vertically. These grooves communicate with the cavity 6 as clearly illustrated, and the rollers .7 and 8 preferably have their axes in different vertical planes, so that the roller 7 hasa portion included in a plane passing tlirouglithe groove 9, and the roller 8 has a portion included in a plane passing through the groove 10.

The sash 2 has a thin strip 11 of leather, rubber, metal, or other `flexible material, this strip being retained by a corner piece 12 on said sash, the corner piece being detachably secured by means of screws 13 which are inserted at diiierent points throughout the height of the sash.

A portion of the strip 11 projects into the groove 10 and is designed toslide through the cavity 6. A bowed spring 14 has one of its ends passing through a slot 15 in a sleeve 16, there being a block of wood 17 within said sleeve and through which the spring 14 extends. A screw 18 serves to 'bind the spring 14 laterally within the block 17 and also serves to hold the block and sleeve to the frame (see Figs. 3 and `5). The opposite end of the spring 14 is free and is designed to press'the strip 11 against the rollerB as said strip passes through the `cav-` ity 6, thus creating a friction which is sui'- iiciently intense to retain the sash 2 in any position into which it is manually moved.

The spring 14 is backed by a threaded adjusting screw 19 which fits within a tapped bushing 20 mounted in the frame as clearly shown in Figs. 2 and 3. `The adjusting screw 19, in the present instance, passes entirely through the frame and has its head 21 outside of said frame, so that by. turning the adjusting screw, various pressures can be rammen 'aime as', reis.,

brought to bear upon the spring 14 to iny crease or reduce the intensity4 of the frictionV piece 23 through which pass screws 24. Thev its head 28inaposition accessible from the inside of theframe.

A cover plate, made in three sections 29, 30 and.Y 31,r is designed to cover the cavity With'the exceptionfof openings 32 and 33 to permit the. strips 11 and 22 to pass therethrough, this arrangement being clearly shown in Fig. 4.

Aspacing rib 34 is secured to the frame 1 between the paths of movement of the sashes 2 and 3. Therefore, since the springs `14: and 25 are positioned at opposite sides of the rollers 'Tand 8, and have a tendency to move toward eachother, the sashes 2 and 3 Will havefa tendency to be brought into frictional engagement With the rib 34. The frame 1 is also preferably provided with removable beads 35 and 36- adjacent the inside surface of the lowersash, and the outside surface of the upper sash'2 as clearly shovvn in Figs. 1, 2and 3..

It -Will be noted that the springs 14 and 25 serve as automatic means for applying friction to the strips'- which are secured to the sashes, andthe rollers 7 and 8 being rotatable, permit an v`easy movement of the sashes vv-hen it is desired to actuate the same.

,- In the form `of `my invention shovvn in Fig.' 6 each Vof the strip-engaging springs 37 is made up of tWo leaves or strips 38 and 39 so that the tension of the spring is distributed -throughout a number of leaves instead of through a single leaf as in Figs. 1 to 5 inclusive. In all other respects the elements illustrated in Fig. G are similar to those describedin connection with Figs. 1 to 5 inclusive, and Ihave therefore given similar parts corresponding reference numerals.

While Ihave described my invention as taking a particularform, it Will. be understood that the various parts of my invention may be changed Without departing from the spi-rit tliereof,fand hence I do not limit myself to the precise construction set forth, but vconsider that I am at liberty to make such changes and alterations as fairly come Within the scope of the appended claims.

Having thus described my invention, What I claim as new. and desire to secure by Letters Patent is:

1. The combination of a Window frame having a longitudinally extending groove, a Window sash, a strip projecting edgevvise from the sash and secured thereto throughout its length, said strip slidably fitting within said groove and bridging the parting between the side edge surface of said sash and the adjacent side surface of said frame, means for engagement with one side surface of the strip, and means automatically operative upon an opposite side surface of said strip vfor pressing said first side surface of the strip into engagement with said irst means, substantially as described.

2. The combination of a window sash, a strip having a portion projecting edgewise from the sash and secured thereto Within its length, said strip bridging the parting between the side edge surface of said sash and the adjacent side surface of said frame, a rotatably mounted roller having its axis substantially parallel to the plane of movement of said sash, and automatically operative means for pressing the projecting portion of the strip into engagement with the peripheral surface of said roller, substantially as described.

3. The combination of a Window frame having a groove formed therein and a cavity With which the groove connnunicatcs, a roller mounted in said cavity, a sash, a strip projecting edgewise from the sash and securedl thereto Within its length, said roller having its axis substantially parallel to the plane of movement of said sash, the projecting portion of said strip being adapted to slide Within said groove and through said cavity and bridging the parting between the sideedge surface of said sash and the adj acent side surface of said frame, and means for pressing the projecting portion of said strips-into engagement with said roller, substantially as described.

4. The combination of a Window frame having a groove formed thereinand a cavity with which the groove communicates, a roller mounted in said cavity, a sash having a strip projecting therefrom and secured thereto Within its length, said strip being designed to slide within said groove and through said cavity, and a spring adapted to press a side surface of said strip into en gagement with said roller, substantially as described.

5. The combination of a Window frame having a groove formed therein and a cavity with which the groove communicates, a roller mounted in -said cavity, a sash having a strip projecting therefrom and secured thereto Within its length, said strip being designed to slidably fit Within said groove and to pass through said cavity, a spring adapted -to press said strip into engagement with said roller, and adjusting means for varying the intensity of pressure of said spring on the strip, substantially as described.

6. The combination of a Window frame having a groove formed therein and a cavity with Which the groove communicates, a roller Larose? mounted in said cavity, a sash having a 'strip projecting therefrom and designed to l through said cavity, a spring adapted to press said strip into engagement with said roller, said roller and spring being mounted within said cavity, a threaded bushing within said frame, an adjusting screw mounted in said bushing and having a portion adapted to engage said spring to vary the intensity of pressure of the latter against said strip, substantially as described.

8. The combination of a window frame having two grooves therein spaced apart and a cavity with which the grooves communicate, two rollers within said cavity and having their axes between planes passing longitudinally through said grooves, two sashes, each sash having a strip projecting therefrom and adapted to slide Within a respective groove and through the cavity, and means for pressing said strips into engagement with the respective rollers, substantially as described.

9. The combination of a window frame having two grooves therein spaced apart and a cavity with which the grooves communicate, two rollers within said cavity and having their axes between planes passing longitudinally through said grooves, two sashes, each sash having a strip projecting therefrom and adapted to slide within a respective groove and through the cavity, and means for pressing said strips into engagement with the respective rollers, said rollers having their axes in different vertical planes, substantially as described.

l0. The combination of a window frame having a groove formed therein and a cavity with which the groove communicates, a strip projecting from said frame, means for engagement with said strip, a sleeve having a slot, a block mounted within the sleeve, a spring having one end extending through said slot and into the block and adapted at its other end to engage and press said strip against said means, and a screw extending through said block and adapted to laterally engage the spring, substantially as described.

In testimony whereof I have signed my name to this specication in the presence of two subscribing witnesses.

DANIEL J. DUNBAR.

Witnesses:

MARY A. INGLAR, CHAS. E.. Porre.

@oplet et this patent :may be obtained for five centr each, by addresaizm the Collmloner et Patente, Washington, D. lll. 

